To validate the effectiveness of uniform sampling on reverse depth in our proposed spherical warping layer, we compare it with other sampling strategy in Table REF  including random sampling and uniform depth sampling. The numbers of hypothesis planes \(D_1\)  and \(D_2\)  are 48 and 24 respectively. For random sampling, we perturb a small Gaussian noise on the uniformly sampled depth hypothesis. From Table REF , we see that our proposed uniform reverse depth sampling has the best performance. The experiment is performed on Omnidirectional Stereo Dataset [1]} where only left-down view is used. The results are all collected at the 60th epoch as a fair comparison.
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